How light sources and distance of the light tip influence water sorption, solubility, and biaxial flexural strength of a composite resin.
Gen Dent
; 58(4): e162-7, 2010.
Article
em En
| MEDLINE
| ID: mdl-20591764
ABSTRACT
This study evaluated the water sorption (WS), solubility (SL), and biaxial flexural strength (BFS) of a resin composite based on different polymerization units, storage permeants (distilled water and 75% ethanol), and distances between the light's tip and the composite resin. Using a stainless steel mold, 80 specimens were made and separated in two independent groups, according to the duration of storage (7 days or 60 days). The specimens were photocured using either a QTH or LED light (both used at 600 mW/cm2 for 40 seconds), with the light's tip guide either 0 mm or 2 mm from the surface of the resin. In general, the 75% ethanol produced higher WS and SL values but lower BFS values compared to water. Both distances influenced the WS and SL values, especially when 75% ethanol was used (p < 0.05), although neither distance affected BFS values (p > 0.05). For nearly all groups, the WS, SL, and BFS in different solvents and at different distances for photocuring of the tested resin were not affected by the curing light used.
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Bases de dados:
MEDLINE
Assunto principal:
Bis-Fenol A-Glicidil Metacrilato
/
Resinas Compostas
/
Cura Luminosa de Adesivos Dentários
/
Lâmpadas de Polimerização Dentária
Limite:
Humans
Idioma:
En
Revista:
Gen Dent
Ano de publicação:
2010
Tipo de documento:
Article
País de afiliação:
Brasil